8991808023 has 24 divisors (see below), whose sum is σ = 13301293824. Its totient is φ = 5398626640.

The previous prime is 8991808019. The next prime is 8991808027. The reversal of 8991808023 is 3208081998.

It is a happy number.

8991808023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8991808019) and next prime (8991808027).

It is not a de Polignac number, because 8991808023 - 2² = 8991808019 is a prime.

It is a super-2 number, since 2×8991808023² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8991808027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76911 + ... + 154592.

It is an arithmetic number, because the mean of its divisors is an integer number (554220576).

Almost surely, 2^8991808023 is an apocalyptic number.

8991808023 is a deficient number, since it is larger than the sum of its proper divisors (4309485801).

8991808023 is a wasteful number, since it uses less digits than its factorization.

8991808023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231635 (or 231624 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 48.

The square root of 8991808023 is about 94825.1444660118. The cubic root of 8991808023 is about 2079.4525204038.

The spelling of 8991808023 in words is "eight billion, nine hundred ninety-one million, eight hundred eight thousand, twenty-three".